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onsemi MMBZ5232BLT3
- Part No.:
- MMBZ5232BLT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5232BLT3.pdf
- Description:
- DIODE ZENER 5.6V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,044
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Product details
Overview
MMBZ5232BLT3 from onsemi is a 5.6 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 11 Ω dynamic impedance at 20 mA test current and 5 μA reverse leakage at 3 V. It provides precision voltage regulation in space-constrained portable electronics.
For engineers reviewing the MMBZ5232BLT3 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, thermal resistance (556 °C/W), ESD rating (>16 kV HBM), cathode-anode polarity marking, and Pb-free RoHS-compliant packaging.
Technical Context
This device operates as a two-terminal voltage reference diode with defined reverse breakdown behavior. Its Zener voltage is specified at IZT = 20 mA, with temperature coefficient near zero at ~5.6 V, minimizing drift over −65°C to +150°C operating range.
The SOT-23 package features pin 1 (anode), pin 2 (no connection), and pin 3 (cathode), with cathode polarity indicated by a band. Thermal performance is characterized for both FR-5 PCB (225 mW) and alumina substrate (300 mW), supporting design flexibility in thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.32–5.88 V at 20 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 225 mW on FR-5 board - maximum continuous power before thermal derating begins at 25°C ambient |
| Zener Impedance (ZZT) | 11 Ω at 20 mA - low dynamic impedance ensures stable regulation under varying load currents |
| Reverse Leakage (IR) | 5 μA at 3 V - minimal off-state current preserves battery life in low-power systems |
| ESD Rating | Class 3 (>16 kV HBM) - robust electrostatic discharge immunity for handling and assembly in automated lines |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial environments |
| Forward Voltage (VF) | 0.9 V max at 10 mA - enables use as clamping diode in bidirectional protection circuits |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; cathode identified by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias regulation configuration |
| 2 | No Connection | Electrically isolated terminal - must not be soldered or routed to any net |
| 3 | Cathode | Connected to higher-potential node; polarity band aligns with this pin for visual orientation |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW power rating on FR-5 | Enables compact voltage reference design without heatsinking on standard PCBs |
| ESD Class 3 (>16 kV HBM) | Eliminates need for external ESD protection in handheld and portable product front-end stages |
| Pb-free, Halogen-free, RoHS compliant | Meets global environmental compliance requirements for consumer and industrial shipments |
| Small SOT-23 footprint | Supports high-density layouts in smartphones, wearables, and IoT sensor nodes |
| AEC-Q101 qualified (SZ variant only) | Validated for automotive applications; standard MMBZ5232BLT3 is industrial-grade |
Applications
| Portable Power Monitoring | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Monitoring battery voltage in Bluetooth earbuds using a microcontroller ADC with internal reference. IC Role / Device Role / Timing Role: Zener diode provides stable 5.6 V reference for ADC scaling and battery state-of-charge calculation. Use Value: Tight 5% VZ tolerance ensures ±0.28 V accuracy in 3.0–4.2 V Li-ion battery range detection. |
Use Scenario: Protecting USB data lines from transient overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Bidirectional clamping device limiting line voltage to ≤5.88 V while passing 0.9 V forward signal. Use Value: 11 Ω ZZT and 5 μA IR minimize signal distortion and standby current in USB 2.0 interfaces. |
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Reset Circuit |
|
Use Scenario: Stabilizing excitation voltage for a 4–20 mA loop-powered pressure transducer. IC Role / Device Role / Timing Role: Shunt regulator maintains constant 5.6 V across transducer bridge, independent of loop current variation. Use Value: 556 °C/W RJA allows thermal stability within 0.5°C over full industrial temperature range. |
Use Scenario: Generating a clean reset threshold for an ARM Cortex-M0+ MCU in a smart meter. IC Role / Device Role / Timing Role: Zener-based RC reset circuit triggers MCU reset when supply drops below 5.32 V. Use Value: 5.32–5.88 V VZ window matches typical 5.0 V ±10% supply rails, ensuring reliable brown-out detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V6 | Same 5.6 V nominal, but 300 mW rating and 40 Ω ZZT at 5 mA - higher power, higher impedance | Preferred for higher-current shunt regulation; less suitable for low-leakage precision references | Select BZX84-C5V6 when >225 mW dissipation or wider temperature coefficient tolerance is acceptable |
| MMBZ5232BS | Same electrical specs, but in SOD-323 package (1.7 × 1.25 × 0.95 mm) - smaller footprint, different thermal profile | Better suited for ultra-high-density RF modules where SOT-23 placement conflicts with ground planes | Choose MMBZ5232BS only when board real estate is constrained and thermal derating on FR-5 is verified |
Compared with BZX84-C5V6 and MMBZ5232BS, the MMBZ5232BLT3 offers optimal balance of low ZZT, industry-standard SOT-23 assembly compatibility, and Class 3 ESD robustness - making it preferred for portable and industrial designs requiring repeatable 20 mA regulation performance.
Availability
MMBZ5232BLT3 is available at Aetrix Electronics and suitable for portable power monitoring, USB port overvoltage clamp, and industrial sensor signal conditioning requiring stable component supply and long-term production continuity.
Supply support for MMBZ5232BLT3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The MMBZ52xxBLT3 series belongs to onsemi's Zener voltage regulator product line, designed specifically for space-constrained, low-power voltage reference and clamping applications in portable and high-density electronics.
FAQ
What is the Zener voltage tolerance of MMBZ5232BLT3?
The MMBZ5232BLT3 has a Zener voltage range of 5.32 V to 5.88 V at 20 mA test current, corresponding to a ±5% tolerance around the nominal 5.6 V rating. This tolerance is guaranteed across the full operating temperature range of −65°C to +150°C and is measured per JEDEC JESD24 standard test conditions.
Does MMBZ5232BLT3 have a no-connect pin, and how should it be handled on the PCB?
Yes, MMBZ5232BLT3 has pin 2 designated as "No Connection" per onsemi's mechanical outline (Style 8). This terminal must remain unconnected - neither soldered nor routed - on the PCB layout. Its presence is structural, not functional, and bridging or terminating it may compromise device reliability or thermal performance.
Is MMBZ5232BLT3 suitable for automotive applications?
The standard MMBZ5232BLT3 is qualified for industrial use. For automotive applications, onsemi offers the SZMMBZ5232BLT3 variant, which carries AEC-Q101 qualification and PPAP capability. The MMBZ5232BLT3 itself lacks automotive-specific stress testing and process controls required for under-hood deployment.
What is the maximum reverse leakage current for MMBZ5232BLT3 at 3 V?
The maximum reverse leakage current (IR) for MMBZ5232BLT3 is 5 μA when biased at 3 V, as specified in the Electrical Characteristics table on page 3 of the datasheet. This value is tested at TA = 25°C and applies to all units within the MMBZ5232BLT3 family, including both tape-and-reel variants.
How does the thermal resistance of MMBZ5232BLT3 affect its power handling on a standard PCB?
MMBZ5232BLT3 has a junction-to-ambient thermal resistance (RJA) of 556 °C/W on FR-5 board. At 25°C ambient, this limits usable power to 225 mW before junction temperature exceeds 150°C. Derating is linear at 1.8 mW/°C above 25°C - so at 70°C ambient, max power drops to 144 mW. Layout with copper pour improves actual performance.
MMBZ5232BLT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 11 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5232BLT3 FAQ
1.How can I place an order for MMBZ5232BLT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5232BLT3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MMBZ5232BLT3 reliable?
The price and inventory of MMBZ5232BLT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5232BLT3 is usually 5 days.
3.What payment methods are accepted for MMBZ5232BLT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5232BLT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5232BLT3?
MMBZ5232BLT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5232BLT3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MMBZ5232BLT3?
For technical support, including MMBZ5232BLT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5232BLT3 requirements.
6.How does Aetrix verify that MMBZ5232BLT3 is sourced from the original manufacturer or authorized distributors?
All MMBZ5232BLT3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MMBZ5232BLT3 meets industry standards.
7.What is the process for return or replacement of MMBZ5232BLT3?
All MMBZ5232BLT3 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5232BLT3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MMBZ5232BLT3 part is unused and in its original packaging.
Return procedure for MMBZ5232BLT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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